Benzyl-PEG-alcohol is a compound consisting of a benzyl group, a polyethylene glycol (PEG) chain, and a hydroxyl group. It is commonly used in pharmaceutical research and development as a linker molecule for the synthesis of drug conjugates. The benzyl group provides stability to the molecule, while the PEG chain imparts solubility and biocompatibility. The hydroxyl group can be used to introduce additional functional groups through chemical modification, allowing for fine-tuning of the properties of the molecule. Overall, Benzyl-PEG-alcohol is a versatile and useful compound for drug delivery and other pharmaceutical applications.